package top.majuan.study.study.servlet.news;

import top.majuan.study.study.dao.TbNewsDAO;
import top.majuan.study.study.entity.Result;
import top.majuan.study.study.entity.TbNews;
import top.majuan.study.study.util.JsonUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

@WebServlet(name = "newsquery", urlPatterns = "/news/query.action")
public class QueryServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        PrintWriter writer = resp.getWriter();
        resp.setContentType("application/json");

        try {
            List<TbNews> list = TbNewsDAO.query();
            Result<List<TbNews>> result = Result.success("查询成功", list);
            writer.println(JsonUtils.stringify(result));
        } catch (Exception e) {
            e.printStackTrace();
            Result<String> result = Result.fail("查询发生错误", null);
            writer.println(JsonUtils.stringify(result));
        }

    }
}
